title: Genome-wide identification and expression analysis of calcium-dependent protein kinase in maize.
abstract: BACKGROUND
  Calcium-dependent protein kinases (CDPKs) have been shown to play important roles in various physiological processes, including plant growth and development, abiotic and biotic stress responses and plant hormone signaling in plants.
  
  
  RESULTS
  In this study, we performed a bioinformatics analysis of the entire maize genome and identified 40 CDPK genes. Phylogenetic analysis indicated that 40 ZmCPKs can be divided into four groups. Most maize CDPK genes exhibited different expression levels in different tissues and developmental stages. Twelve CDPK genes were selected to respond to various stimuli, including salt, drought and cold, as well as ABA and H2O2. Expression analyses suggested that maize CDPK genes are important components of maize development and multiple transduction pathways.
  
  
  CONCLUSIONS
  Here, we present a genome-wide analysis of the CDPK gene family in maize for the first time, and this genomic analysis of maize CDPK genes provides the first step towards a functional study of this gene family in maize.
authors.affiliation: State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, Shandong 271018, China.
authors.forename: Xiangpei
authors.initials: X
authors.lastname: Kong
authors.forename: Wei
authors.initials: W
authors.lastname: Lv
authors.forename: Shanshan
authors.initials: S
authors.lastname: Jiang
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.forename: Guohua
authors.initials: G
authors.lastname: Cai
authors.forename: Jiaowen
authors.initials: J
authors.lastname: Pan
authors.forename: Dequan
authors.initials: D
authors.lastname: Li
mesh_terms: D000040:Abscisic Acid / Q000494:pharmacology; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000235:genetics*; D032461:Chromosomes, Plant / Q000235:genetics; D003080:Cold Temperature / Q000009:adverse effects; D055864:Droughts; D020869:Gene Expression Profiling; D018745:Genome, Plant / Q000235:genetics; D023281:Genomics; D006861:Hydrogen Peroxide / Q000494:pharmacology; D009928:Organ Specificity; D010802:Phylogeny; D018517:Plant Roots / Q000187:drug effects / Q000201:enzymology / Q000235:genetics / Q000254:growth & development; D012965:Sodium Chloride / Q000494:pharmacology; D013312:Stress, Physiological / Q000187:drug effects / Q000235:genetics; D003313:Zea mays / Q000187:drug effects / Q000201:enzymology* / Q000235:genetics* / Q000254:growth & development
chemical_list: D012965:Sodium Chloride; D000040:Abscisic Acid; D006861:Hydrogen Peroxide; D017871:Calcium-Calmodulin-Dependent Protein Kinases